76 lines
2.2 KiB
C#
76 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Windows;
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using System.ComponentModel;
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namespace Microsoft.Research.DynamicDataDisplay.ViewportRestrictions
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{
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/// <summary>
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/// Represents a viewport restriction which modifies x coordinates of result visible rect to be adjacent to the right border of initial rect and have a fixed given width.
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/// Probably is better to add to FitToViewRestrictions collection of <see cref="Viewport"/>.
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/// </summary>
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public class FollowWidthRestriction : ViewportRestriction
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="FollowWidthRestriction"/> class.
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/// </summary>
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public FollowWidthRestriction() { }
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/// <summary>
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/// Initializes a new instance of the <see cref="FollowWidthRestriction"/> class with the given width.
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/// </summary>
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/// <param name="width">The width.</param>
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public FollowWidthRestriction(double width)
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{
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Width = width;
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}
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private double width = 1;
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/// <summary>
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/// Gets or sets the width of result visible rectangle.
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/// Default value is 1.0.
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/// </summary>
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/// <value>The width.</value>
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[DefaultValue(1.0)]
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public double Width
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{
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get { return width; }
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set
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{
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if (width != value)
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{
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width = value;
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RaiseChanged();
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}
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}
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}
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/// <summary>
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/// Applies the restriction.
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/// </summary>
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/// <param name="previousDataRect">Previous data rectangle.</param>
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/// <param name="proposedDataRect">Proposed data rectangle.</param>
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/// <param name="viewport">The viewport, to which current restriction is being applied.</param>
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/// <returns>New changed visible rectangle.</returns>
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public override DataRect Apply(DataRect previousDataRect, DataRect proposedDataRect, Viewport2D viewport)
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{
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if (proposedDataRect.IsEmpty)
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return proposedDataRect;
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double followWidth = proposedDataRect.Width;
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if (!viewport.UnitedContentBounds.IsEmpty)
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{
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followWidth = Math.Min(width, viewport.UnitedContentBounds.Width);
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}
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if (followWidth.IsInfinite())
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followWidth = width;
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Rect visible = new Rect(proposedDataRect.XMin + proposedDataRect.Width - followWidth, proposedDataRect.YMin, followWidth, proposedDataRect.Height);
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return visible;
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}
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}
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}
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